1312121332 has 12 divisors (see below), whose sum is σ = 2296580580. Its totient is φ = 655955456.

The previous prime is 1312121311. The next prime is 1312121339. The reversal of 1312121332 is 2331212131.

It can be written as a sum of positive squares in 2 ways, for example, as 1123992676 + 188128656 = 33526^2 + 13716^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312121339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6228 + ... + 51604.

It is an arithmetic number, because the mean of its divisors is an integer number (191381715).

Almost surely, 2^1312121332 is an apocalyptic number.

It is an amenable number.

1312121332 is a deficient number, since it is larger than the sum of its proper divisors (984459248).

1312121332 is a wasteful number, since it uses less digits than its factorization.

1312121332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52610 (or 52608 counting only the distinct ones).

The product of its digits is 216, while the sum is 19.

The square root of 1312121332 is about 36223.2153735695. The cubic root of 1312121332 is about 1094.7744806377.

Adding to 1312121332 its reverse (2331212131), we get a palindrome (3643333463).

It can be divided in two parts, 13121 and 21332, that added together give a triangular number (34453 = T₂₆₂).

The spelling of 1312121332 in words is "one billion, three hundred twelve million, one hundred twenty-one thousand, three hundred thirty-two".